CN114639903B - Soft package button cell with improved skirt edge and skirt edge folding method of cell - Google Patents
Soft package button cell with improved skirt edge and skirt edge folding method of cell Download PDFInfo
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- CN114639903B CN114639903B CN202210147843.9A CN202210147843A CN114639903B CN 114639903 B CN114639903 B CN 114639903B CN 202210147843 A CN202210147843 A CN 202210147843A CN 114639903 B CN114639903 B CN 114639903B
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- skirt edge
- skirt
- groove
- winding core
- upper cover
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 37
- 210000001503 joint Anatomy 0.000 claims abstract description 3
- 230000007704 transition Effects 0.000 claims description 17
- 239000002390 adhesive tape Substances 0.000 claims description 15
- 238000004049 embossing Methods 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 239000002985 plastic film Substances 0.000 claims description 6
- 229920006255 plastic film Polymers 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims description 3
- 238000007688 edging Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a soft-package button cell with an improved skirt edge and a skirt edge folding method of the cell, comprising an upper cover, a lower cover, a winding core and a tab; the lower end of the upper cover is annularly provided with a first skirt edge along the circumferential direction of the upper cover; the upper end of the lower cover is annularly provided with a second skirt along the circumferential direction of the lower cover; the winding core is arranged between the upper cover and the lower cover; the first skirt edge is sequentially provided with a plurality of first grooves in a staggered manner along the circumferential direction of the first skirt edge; the second skirt edge is provided with a plurality of second grooves in a staggered manner along the circumferential direction of the second skirt edge; the first skirt edge and the second skirt edge are in butt joint, the side ends of the winding core are sealed by the first skirt edge and the second skirt edge, and the first groove and the second groove are overlapped in the vertical direction. The invention is used for solving the problem that the soft-package button cell skirt is large in the diameter direction, not only can the energy density of the cell be improved, but also the cell skirt can be used without being opened.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a soft-package button battery with an improved skirt edge and a skirt edge folding method of the battery.
Background
The traditional soft-package button cell is formed by wrapping a cell roll core with an aluminum plastic film, embossing and shaping after flanging. The battery skirt edge is toothed after embossing and flanging, the skirt edge is toothed after battery shaping and is tightly clung to the periphery of the battery main body, the toothed skirt edge is thicker, the diameter is larger, the diameter of the battery is larger, and the energy density of the battery main body is lower. And when the battery is used for a long time, the battery skirt is opened due to the material characteristics after embossing, and the diameter of the battery is also enlarged.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a soft-package button cell with an improved skirt edge and a skirt edge folding method of the battery, which are used for solving the problem that the skirt edge of the soft-package button cell has large occupation ratio in the diameter direction, not only can realize the improvement of the energy density of the cell, but also can ensure that the skirt edge of the cell is not opened when being used.
The invention provides a soft-package button cell with an improved skirt edge, which comprises an upper cover, a lower cover, a winding core and a tab;
the lower end of the upper cover is provided with a first skirt edge in a surrounding manner along the circumferential direction of the upper cover, and the upper cover is provided with a first caulking groove;
The upper end of the lower cover is provided with a second skirt edge in a surrounding manner along the circumferential direction of the lower cover, and the lower cover is provided with a second caulking groove;
The winding core is arranged between the upper cover and the lower cover and is inserted into the first caulking groove and the second caulking groove;
The first skirt edge is sequentially provided with a plurality of first grooves in a staggered manner along the circumferential direction of the first skirt edge;
The second skirt edge is provided with a plurality of second grooves in a staggered manner along the circumferential direction of the second skirt edge; the first skirt edge and the second skirt edge are in butt joint with each other, the side ends of the winding core are sealed by the first skirt edge and the second skirt edge, and the first groove and the second groove are overlapped in the vertical direction;
one end of the tab is connected with the winding core, and the other end of the tab horizontally extends out from the press joint of the first skirt edge and the second skirt edge.
In the above technical solution, the present invention may be further improved as follows.
The preferable technical scheme is characterized in that: the part side end of the first skirt edge, which is close to the tab, is provided with a smooth first arc-shaped part, the part side end of the second skirt edge, which is close to the tab, is provided with a smooth second arc-shaped part, and the first arc-shaped part is matched with the second arc-shaped part.
The preferable technical scheme is characterized in that: the first grooves are T-shaped grooves, first convex columns located between two adjacent first grooves are arranged on the first skirt edge, and the first convex columns are T-shaped columns.
The preferable technical scheme is characterized in that: the second groove is a T-shaped groove, and a second convex column positioned between two adjacent second grooves is arranged on the second skirt edge and is a T-shaped column.
The preferable technical scheme is characterized in that: the sum of the depth of the first caulking groove and the depth of the second caulking groove is larger than or equal to the height of the winding core, and the diameter length of the first caulking groove and the diameter length of the second caulking groove are larger than or equal to the diameter of the winding core respectively.
The preferable technical scheme is characterized in that: the tab includes conductive strip and sticky tape, the sticky tape is fixed to be set up on the conductive strip, the sticky tape includes basal portion, wing portion and transition portion, vertical being equipped with on the basal portion is used for letting the through-hole that the conductive strip passed, the wing portion is two and symmetrical connection is in the left and right sides end of basal portion, the length of wing portion is less than the basal portion, the transition portion is four, two the upside end and the downside end of wing portion pass through respectively the transition portion with the basal portion is connected.
The preferable technical scheme is characterized in that: the outer wall surface of the transition part is an arc-shaped surface, and the base part, the wing parts and the transition part are uniformly and integrally formed.
The preferable technical scheme is characterized in that: the conductive strip is provided with a heat conducting sheet positioned above the adhesive tape.
The preferable technical scheme is characterized in that: the left side end and/or the right side end of the heat conducting fin are/is provided with a heat radiating fin, and the heat radiating fin is provided with a plurality of fins.
The invention also provides a skirt edge folding method of the soft-package button cell based on the skirt edge improvement, which comprises the following steps:
S1, processing the winding core, an upper cover and a lower cover, wherein the upper cover and the lower cover are made of aluminum plastic films and are punched by punching equipment, the first caulking groove is punched by the punching of the upper cover, the second caulking groove is punched by the punching of the lower cover, the upper cover and the lower cover are respectively assembled at the upper end and the lower end of the winding core, and the first skirt edge and the second skirt edge are mutually butted;
S2, simultaneously applying pressure to the first skirt edge and the second skirt edge through an embossing jig to perform embossing processing, and embossing a first groove and a second groove respectively;
s3, bending the first skirt edge and the second skirt edge in a specified direction at the same time, heating the first skirt edge and the second skirt edge at a high temperature after bending, applying pressure to the left side and the right side of the first skirt edge and the second skirt edge at the same time, and uniformly pressing the first groove, the second groove, the first convex column and the second convex column to be thin;
S4, shaping the soft-package button cell with the improved skirt edge.
The beneficial effects of the invention are as follows: according to the invention, after the soft-package button cell is normally embossed, the first skirt edge and the second skirt edge are subjected to high-temperature hot-pressing flanging, so that the first skirt edge and the second skirt edge are mainly thinner, and then the soft-package button cell is normally shaped. After the shaping, the diameter of the battery is smaller due to the fact that the first skirt edge and the second skirt edge are thinner, and the energy density of the battery is improved. Simultaneously, after first shirt rim and second shirt rim hot pressing attenuation, first shirt rim and second shirt rim are fixed together, and first shirt rim and second shirt rim are difficult for yielding, have reached the difficult effect that opens of first shirt rim and second shirt rim.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
Fig. 1 is an assembly schematic diagram of an upper cover and a winding core according to embodiment 1 of the present invention.
Fig. 2 is an assembly schematic diagram of the lower cover and the winding core according to embodiment 1 of the present invention.
Fig. 3 is an exploded view of a skirt-modified soft pack button cell according to example 1 of the present invention, which is not embossed.
Fig. 4 is a schematic structural view of a tab according to embodiment 2 of the present invention.
Fig. 5 is a schematic diagram of the fin and heat sink results according to embodiment 2 of the present invention.
In the drawings, the meaning of each symbol is as follows:
1. an upper cover; 11. a first skirt; 12. a first caulking groove; 13. a first groove; 14. a first arc-shaped portion; 15. a first post; 2. a lower cover; 21. a second skirt; 22. a second caulking groove; 23. a second groove; 24. a second arc-shaped portion; 25. a second post; 3. a winding core; 4. a tab; 41. a conductive tape; 411. a heat conductive sheet; 412. a heat sink; 413. fins; 42. an adhesive tape; 421. a base; 422. a wing portion; 423. a transition portion.
Detailed Description
For a further understanding of the invention, its features and advantages, the following examples are set forth to illustrate, but are not limited to, the following examples:
Example 1
Referring to fig. 1 to 3, the present embodiment provides a skirt-improved soft-pack button cell, which comprises an upper cover 1, a lower cover 2, a winding core 3 and a tab 4;
the lower end of the upper cover 1 is provided with a first skirt edge 11 along the circumferential direction of the upper cover 1 in a ring manner, and the upper cover 1 is provided with a first caulking groove 12;
the upper end of the lower cover 2 is provided with a second skirt edge 21 along the circumferential direction of the lower cover 2, and the lower cover 2 is provided with a second caulking groove 22;
The winding core 3 is arranged between the upper cover 1 and the lower cover 2, and the winding core 3 is inserted into the first caulking groove 12 and the second caulking groove 22;
The first skirt edge 11 is provided with a plurality of first grooves 13 in a staggered manner along the circumferential direction of the first skirt edge 11;
The second skirt edge 21 is provided with a plurality of second grooves 23 in a staggered manner along the circumferential direction of the second skirt edge 21; the first skirt edge 11 and the second skirt edge 21 are butted with each other, and the first skirt edge 11 and the second skirt edge 21 seal the side ends of the winding core 3, and the first groove 13 and the second groove 23 coincide in the vertical direction;
One end of the tab 4 is connected with the winding core, and the other end of the tab 4 horizontally extends out from the press joint of the first skirt edge 11 and the second skirt edge 21.
In this embodiment, by providing the upper cover 1, the lower cover 2, the winding core 3 and the tab 4, by disposing the winding core 3 between the upper cover 1 and the lower cover 2, the upper portion of the winding core 3 is placed into the first caulking groove 12, the lower portion of the winding core 3 is placed into the second caulking groove 22, and simultaneously the first skirt edge 11 and the second skirt edge 21 are mutually crimped together, so as to realize sealing of the winding core 3. The first groove 13 and the second groove 23 make the first skirt edge 11 and the second skirt edge 21 thinner, make the battery diameter smaller, and improve the battery energy density. Meanwhile, after the first skirt edge 11 and the second skirt edge 21 are thinned by hot pressing, the first skirt edge 11 and the second skirt edge 21 are fixed together, the first skirt edge 11 and the second skirt edge 21 are not easy to deform, and the effect that the first skirt edge 11 and the second skirt edge 21 are not easy to open is achieved.
Referring to fig. 1 and 2, a portion of the first skirt 11 near the tab 4 has a rounded first arc portion 14, a portion of the second skirt 21 near the tab 4 has a rounded second arc portion 24, and the first arc portion 14 is adapted to the second arc portion 24.
The first arc-shaped part 14 and the second arc-shaped part 24 are arranged to enable the first skirt edge 11 and the second skirt edge 21 at the position of the tab 4 to have a certain width, so that the crimping effect of the first arc-shaped part 14 and the second arc-shaped part 24 on the tab 4 is ensured after the tab 4 horizontally stretches out from the crimping position of the first skirt edge 11 and the second skirt edge 21.
Referring to fig. 1, the first groove 13 is a T-shaped groove, the first skirt 11 is provided with a first protrusion 15 located between two adjacent first grooves 13, and the first protrusion 15 is a T-shaped post.
The first groove 13 and the first convex column 15 are formed by folding the first skirt edge 11, and are used for reducing the diameter of the battery and improving the energy density of the battery.
Referring to fig. 2, the second groove 23 is a T-shaped groove, the second skirt 21 is provided with a second protrusion 25 located between two adjacent second grooves 23, and the second protrusion 25 is a T-shaped post.
The second groove 23 and the second convex column 25 are formed by folding the second skirt edge 21, and are used for reducing the diameter of the battery and improving the energy density of the battery.
Referring to fig. 1 to 3, the sum of the depth of the first caulking groove 12 and the depth of the second caulking groove 22 is greater than or equal to the height of the winding core 3, and the radial length of the first caulking groove 12 and the radial length of the second caulking groove 22 are greater than or equal to the diameter of the winding core 3 respectively.
This arrangement allows the winding core 3 to be smoothly fitted into the first and second caulking grooves 12 and 22.
Example 2
Referring to fig. 4 to 5, the tab 4 includes a conductive strip 41 and an adhesive tape 42, the adhesive tape 42 is fixedly disposed on the conductive strip 41, the adhesive tape 42 includes a base 421, a wing 422 and a transition portion 423, through holes for allowing the conductive strip 41 to pass through are vertically provided on the base 421, the two wing 422 are symmetrically connected to left and right sides of the base 421, the length of the wing 422 is smaller than that of the base 421, the four transition portions 423 are provided, and the upper side ends and the lower side ends of the two wing 422 are respectively connected with the base 421 through the transition portion 423.
Referring to fig. 4, the outer wall surface of the transition portion 423 is an arc surface, and the base 421, the wing 422, and the transition portion 423 are integrally formed.
The two sides of the two ends of the adhesive tape 42 are changed into transition parts 423 from right-angle edges; a part of adhesive tape 42 in the conductive tape 41 is reserved, the adhesive tape 42 is ensured to be arranged in the packaging area, and the sealing head of packaging equipment is not directly pressed onto the conductive tape 41 during heating packaging, so that the packaging position aluminum-plastic film is damaged or the aluminum layer of the aluminum-plastic film is contacted with the conductive tape 41 to form short circuit or micro short circuit; meanwhile, the residues of the adhesive tapes 42 on the two sides of the tab 4 in the soft-package button cell are reduced, the tab 4 after the soft-package button cell is packaged with smaller volume and the appearance of the soft-package button cell are shaped, the exposed height of the soft-package button cell outside the adhesive tapes 42 on the two sides of the tab 4 after the soft-package button cell is packaged is reduced, and the appearance shaping of the soft-package button cell after the soft-package button cell is packaged and the limitation of the pack size of a product are facilitated.
Referring to fig. 4 and 5, the conductive strip 41 is provided with a heat conductive sheet 411 above the adhesive tape 42.
Referring to fig. 4 and 5, the heat conducting fin 411 has a heat sink 412 at the left and right ends, and a plurality of fins 413 are disposed on the heat sink 412.
Through setting up conducting strip 411 and fin 412, can derive the heat that utmost point ear 4 structure produced fast when short circuit detects, effectively reduced the risk of catching fire when short circuit detects for soft packet of knot formula battery is safer when short circuit detects, thereby makes soft packet of knot formula battery safer when using.
The fins 413 are disposed in several numbers and juxtaposed on the heat sink 412, and the fins 413 are used to increase the heat dissipation area.
Example 3
The present embodiment also provides a method for folding a skirt of a soft pack button cell with a modified skirt according to embodiment 1 or embodiment 2, comprising the steps of:
S1, processing the winding core 3, an upper cover 1 and a lower cover 2, wherein the upper cover 1 and the lower cover 2 are all made of aluminum plastic films and are punched by punching equipment, the first caulking groove 12 is punched by punching the upper cover 1, the second caulking groove 22 is punched by punching the lower cover 2, the upper cover 1 and the lower cover 2 are respectively assembled at the upper end and the lower end of the winding core 3, and the first skirt edge 11 and the second skirt edge 21 are mutually butted;
S2, embossing the first skirt edge 11 and the second skirt edge 21 by applying pressure simultaneously through an embossing jig, and embossing a first groove 13 and a second groove 23 respectively;
S3, bending the first skirt edge 11 and the second skirt edge 21 in a specified direction at the same time, heating the first skirt edge 11 and the second skirt edge 21 at a high temperature after bending, and simultaneously applying pressure to the left side and the right side of the first skirt edge 11 and the second skirt edge 21 to uniformly press the first groove 13, the second groove 23, the first convex column 15 and the second convex column 25 to be thin;
S4, shaping the soft-package button cell with the improved skirt edge.
In this embodiment, after the soft-pack button cell is embossed normally, the first skirt 11 and the second skirt 21 are hot-pressed and folded at high temperature, so that the first skirt 11 and the second skirt 21 are mainly made thinner, and then shaped normally. After such shaping, the cell diameter is smaller and the cell energy density is improved due to the thinner first skirt 11 and second skirt 21. Meanwhile, after the first skirt edge 11 and the second skirt edge 21 are thinned by hot pressing, the first skirt edge 11 and the second skirt edge 21 are fixed together, the first skirt edge 11 and the second skirt edge 21 are not easy to deform, and the effect that the first skirt edge 11 and the second skirt edge 21 are not easy to open is achieved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" is two or more unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (6)
1. A soft pack button cell with improved skirt edge, characterized in that: comprises an upper cover, a lower cover, a winding core and a tab;
the lower end of the upper cover is provided with a first skirt edge in a surrounding manner along the circumferential direction of the upper cover, and the upper cover is provided with a first caulking groove;
The upper end of the lower cover is provided with a second skirt edge in a surrounding manner along the circumferential direction of the lower cover, and the lower cover is provided with a second caulking groove;
The winding core is arranged between the upper cover and the lower cover and is inserted into the first caulking groove and the second caulking groove;
The first skirt edge is sequentially provided with a plurality of first grooves in a staggered manner along the circumferential direction of the first skirt edge;
The second skirt edge is provided with a plurality of second grooves in a staggered manner along the circumferential direction of the second skirt edge; the first skirt edge and the second skirt edge are in butt joint with each other, the side ends of the winding core are sealed by the first skirt edge and the second skirt edge, and the first groove and the second groove are overlapped in the vertical direction;
One end of the tab is connected with the winding core, and the other end of the tab horizontally extends out from the press joint part of the first skirt edge and the second skirt edge;
The electrode lug comprises a conductive belt and adhesive tapes, wherein the adhesive tapes are fixedly arranged on the conductive belt, each adhesive tape comprises a base part, two wing parts and a transition part, through holes for the conductive belt to pass through are vertically formed in the base parts, the two wing parts are symmetrically connected with the left side end and the right side end of the base part, the length of each wing part is smaller than that of the base part, the number of the transition parts is four, and the upper side ends and the lower side ends of the two wing parts are respectively connected with the base part through the transition parts;
The outer wall surface of the transition part is an arc-shaped surface, and the base part, the wing parts and the transition part are uniformly formed;
The conductive strip is provided with a heat conducting sheet positioned above the adhesive tape;
The left side end and/or the right side end of the heat conducting fin are/is provided with a heat radiating fin, and the heat radiating fin is provided with a plurality of fins.
2. A skirt modified soft pack button cell in accordance with claim 1 wherein: the part side end of the first skirt edge, which is close to the tab, is provided with a smooth first arc-shaped part, the part side end of the second skirt edge, which is close to the tab, is provided with a smooth second arc-shaped part, and the first arc-shaped part is matched with the second arc-shaped part.
3. A skirt modified soft pack button cell in accordance with claim 2 wherein: the first grooves are T-shaped grooves, first convex columns located between two adjacent first grooves are arranged on the first skirt edge, and the first convex columns are T-shaped columns.
4. A skirt modified soft pack button cell in accordance with claim 3, wherein: the second groove is a T-shaped groove, and a second convex column positioned between two adjacent second grooves is arranged on the second skirt edge and is a T-shaped column.
5. The skirt modified soft pack button cell of claim 4 wherein: the sum of the depth of the first caulking groove and the depth of the second caulking groove is larger than or equal to the height of the winding core, and the diameter length of the first caulking groove and the diameter length of the second caulking groove are larger than or equal to the diameter of the winding core respectively.
6. A method of hem edging a soft pack button cell based on a hem improvement as claimed in any of claims 1-5, characterized by: the method comprises the following steps:
S1, processing the winding core, an upper cover and a lower cover, wherein the upper cover and the lower cover are made of aluminum plastic films and are punched by punching equipment, the first caulking groove is punched by the punching of the upper cover, the second caulking groove is punched by the punching of the lower cover, the upper cover and the lower cover are respectively assembled at the upper end and the lower end of the winding core, and the first skirt edge and the second skirt edge are mutually butted;
S2, simultaneously applying pressure to the first skirt edge and the second skirt edge through an embossing jig to perform embossing processing, and embossing a first groove and a second groove respectively;
s3, bending the first skirt edge and the second skirt edge in a specified direction at the same time, heating the first skirt edge and the second skirt edge at a high temperature after bending, applying pressure to the left side and the right side of the first skirt edge and the second skirt edge at the same time, and uniformly pressing the first groove, the second groove, the first convex column and the second convex column to be thin;
S4, shaping the soft-package button cell with the improved skirt edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147843.9A CN114639903B (en) | 2022-02-17 | 2022-02-17 | Soft package button cell with improved skirt edge and skirt edge folding method of cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147843.9A CN114639903B (en) | 2022-02-17 | 2022-02-17 | Soft package button cell with improved skirt edge and skirt edge folding method of cell |
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| CN112366394A (en) * | 2020-11-11 | 2021-02-12 | 路华置富电子(深圳)有限公司 | Button cell |
| CN113708019A (en) * | 2021-09-23 | 2021-11-26 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
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